Harrington Hoists and Cranes LB Lever Hoist - (L5) - Manual (Page 24)

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Table 5-3 Hoist Inspection Methods and Criteria
Item Method Criteria Action
Lifting System –
Components
Visual Components should not be deformed, scarred or
show significant wear. Refer to Figure 5-4. Replace
Lifting System –
Selector Pawl Spring
Measure The “L” dimension should not be less than the listed
in Table 5-7. Replace
Lifting System –
Brake Spring
Measure The “L” dimension should not be less than the listed
in Table 5-
8. The “A” angle degree should not be
greater than the discard value listed in Table 5-8.
Replace
Lifting System –
Free Chain Spring
Measure The “L” dimension should not be less than the
discard value listed in Table 5-
9. The “A” angle
degree should not be less than the discard value
listed in Table 5-9.
Replace
Hooks - Surface
Condition Visual Should be free of gouges, deep nicks, dents, weld
splatter and significant corrosion. Replace.
Hooks - Fretting
wear Measure The "u" and "t" dimensions should not be less than
discard value listed in Table 5-10. Replace.
Hooks - Stretch Measure The "k" dimension should not be greater than 1.05
times that measured and recorded at the time of
purchase (See Section 3.4). If recorded "k" values
are not available for hooks when new, use nominal
"k" values from Table 5-10. Replace.
Hooks - Deformation Visual Should be free of twists and deformations. See
Figure 5-5. Replace
Hooks - Bent Shank
or Neck Visual Shank and neck portions of hook should be free of
deformations. Replace.
Hooks - Swivel Visual, Function Bearing parts and surfaces should not show
significant wear, and should be free of dirt, grime
and deformations. Hook should rotate freely with no
roughness. See Figure 5-5. Clean/lubricate, or
replace as required.
Hooks - Idle Sheave
and Shaft (Multiple
Fall Hoist) Visual, Function Pockets of Idle Sheave should be free of significant
wear. Idle Sheave surfaces should be free of nicks,
gouges, dirt and grime. Bearing parts and surfaces
of Idle Sheave and Axle should not show significant
wear. Idle Sheave should rotate freely with no
roughness or significant free play. Clean/lubricate, or
replace as required.
Hooks - Hook
Latches Visual, Function Latch should not be deformed. Attachment of latch
to hook should not be loose. Latch spring should
not be missing and should not be weak. Latch
movement should not be stiff - when depressed and
released latch should snap smartly to its closed
position. Replace.
Hooks - Yoke
Assembly Visual Should be free of significant rust, weld splatter,
nicks, gouges. Holes should not be elongated,
fasteners should not be loose, and there should be
no gap between mating parts. Tighten or replace
as required.